Brain abscess causes: Difference between revisions
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Brain abscesses commonly occur when bacteria or fungi infect part of the brain. Swelling and irritation (inflammation) develop in response to this infection. Infected brain cells, white blood cells, live and dead bacteria, and fungi collect in an area of the brain. Tissue forms around this area and creates a mass. | Brain abscesses commonly occur when bacteria or fungi infect part of the brain. Swelling and irritation (inflammation) develop in response to this infection. Infected brain cells, white blood cells, live and dead bacteria, and fungi collect in an area of the brain. Tissue forms around this area and creates a mass. | ||
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Revision as of 19:56, 30 November 2012
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
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Causes
Brain abscesses commonly occur when bacteria or fungi infect part of the brain. Swelling and irritation (inflammation) develop in response to this infection. Infected brain cells, white blood cells, live and dead bacteria, and fungi collect in an area of the brain. Tissue forms around this area and creates a mass.
While this immune response can protect the brain by isolating the infection, it can also do more harm than good. The brain swells. Because the skull cannot expand, the mass may put pressure on delicate brain tissue. Infected material can block the blood vessels of the brain.
The germs that cause a brain abscess usually reach the brain through the blood. The source of the infection is often not found. However, the most common source is a lung infection. Less often, a heart infection is to blame. Germs may also travel from a nearby infected area (for example, an ear infection) or enter the body during an injury (such as a gun or knife wound) or surgery.
In children with heart disease or a birth defect, such as those with tetralogy of fallot, infections are more able to reach the brain from the intestines, teeth, or other body areas.